Causes
Broadly speaking, the causes of global warming can be split up onto two groups: man-made and natural.
Natural causes are created by nature, like solar radiation and the emission of gas, however, this only being in small quantities, comparative of the Co2 emissions emitted due to man, particularly over the past 100 years or so.
Man-made causes are much more epic in proportion. Co2 emissions have increased by a considerable amount due to the combusting of fossil fuels. Plus deforestation plays another role in the release of Co2 into the atmosphere.